ELTEX ESR-3100 - 16.6 NTP configuration

ESR series service routers.ESR-Series. User manual
588
Create a permissive interzonal interaction rule:
esr(config)# security zone-pair LAN self
esr(config-zone-pair)# rule 50
esr(config-zone-pair-rule)# action permit
esr(config-zone-pair-rule)# match protocol tcp
esr(config-zone-pair-rule)# match destination-port proxy
esr(config-zone-pair-rule)# enable
esr(config-zone-pair-rule)# exit
esr(config-zone-pair)# exit
16.6 NTP configuration
NTP(NetworkTimeProtocol)— network protocol for synchronizing the internal clock of equipment using IP
networks, uses the UDP protocol for its operation, takes into account transmission times and uses algorithms
to achieve high precision time synchronization.
16.6.1 Configuration algorithm
Step Description Command Keys
1 Enable NTP. esr(config)# ntp enable
2 Set the IP address of the NTP
server or NTP synchronization
participant.
esr(config)# ntp { server |
peer } { <IP> }
<IP> – destination IP address (gateway),
defined as AAA.BBB.CCC.DDD where each
part takes values of [0..255].
3 Set authentication key (optional). esr(config-ntp)# key <ID> <ID> – key identifier, set in the range of
[1..255].
4 Set the maximum time interval
between sending messages to the
NTP server (optional).
esr(config-ntp)# maxpoll
<INTERVAL>
<INTERVAL> – maximum value of poll
interval. The command parameter is used
as an indicator of the power of two when
calculating the interval durability in seconds;
it is calculated by raising two to power that
is specified by the command parameter,
takes the value of [10..17].
Default value: 10 (2
10
= 1024 seconds or 17
minutes 4 seconds).
5 Set the minimum time interval
between sending messages to the
NTP server (optional).
esr(config-ntp)# minpoll
<INTERVAL>
<INTERVAL> – minimum value of poll
interval in seconds; it is calculated by raising
two to power that is specified by the
command parameter, takes the value of
[4..6].
Default value: 6 (2
6
= 64 seconds or 1
minutes 4 seconds).